Operating mechanism for pumps.



R. T. GRUCOTT.

OPERATING MECHANISM FOR PUMPS.

APPLICATION FILED FEB. 19. ISIG.

1,232,533, I Patented July 10, 1917.

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RICHARD THOMAS GROGO'IT, OF LONGPORT, STOKE-UPON-TRENT, ENGLAND.

OPERATING MECHANISM FOR PUMPS.

Application filed February 19, 1916.

T 0 all whom it may concern Be it known that I, RICHARD THoMAs Gnoco'r'r, residing at Longport, Stoke-upon- Trent, in the county of Stafford, in the Kingdom of England, have invented certain new and useful Improvements in Operating Mechanism for Pumps, of which the following is a specification.

The present invention relates to an improvement in operating mechanism for pumps of the type in which an eccentric or cam lifts a ram which is descended by means of a dead weight, the eccentric picking up the ram again when it has descended to a predetermined position. The invention is particularly applicable to pumps for slip.

The improvement of the present invention consists in interposing between the eccentric or lifting cam and the ram a single hook or lifting bar whereby the apparatus is considerably simplified over previous arrangements.

The invention is illustrated in the accompanying drawing.

The pump ram 1 is adapted to descend under its own weight and the weights of a crossbar 2 connected to it and carrying a plurality of dead weights 3. The cross-bar 2 carries a pivoted hook 4 adapted to normally lie in the position illustrated by reason of its mounting relatively to its pivot 5. The single hook 4 is adapted to engage with a reciprocating pin 6 connected to the connpoting rod 7 of a lifting eccentric 8 or the li re.

As the pump plunger 1 reaches its lowest position at a predetermined moment a spring pin 9 will engage the arm 10 of the hook 4 and so bring the hook 4 into range of the reciprocating pin 6 so that immediately connection has been established between the single hook 4 and the pin 6 the pump plunger 1 will be raised to its highest position, whereupon directly the pin 6 descends again it bears against the inner edge of the shank of the hook 4 to automatically disconnect it from the pin 6 until such time as the arm 10 again comes into range of the spring pin 9. The weight of the arm 10 also assists in this automatic disconnection by reason of the fact that it lies on the opposite side of the hook 4 to the pin 6.

The arrangement above described it will be seen is considerably simplified over nor- Specification of Letters Patent.

Patented July 10, 1917.

Serial No. 79,389.

mal arrangements in which pairs of hook arms 4 with duplicate control gear have been provided to engage with the reciprocating Din 6.

I declare that what I claim is 1. A pump comprising a barrel, a plunger adapted to descend by dead-weight, a constantly reciprocating pin, a single pivoted hook on said plunger, means to connect said single hook and said pin when said plunger has fallen to a predetermined position, and means to swing said single hook about its pivot clear of said pin when said plunger has been raised by said pin to its highest position, the disconnection being effective until the plunger and hook have fallen to a predetermined position.

2. A pump comprising a barrel, a plunger adapted to descend by dead-weight, a con stantly reciprocating pin, a single pivoted hook on said plunger, an arm on said hook on the opposite side thereof to said reciprocating pin, a stop engaging said arm to swing said hook into range of said pin when the plunger has descended to a predetermined low position, said arm acting by reason of its weight to swing the hook about its pivot to disengage the hook and pivot and maintain these parts disengaged when the plunger has been lifted to the top of its stroke by the said pin.

3. A pump comprising a barrel, a plunger adapted to descend by dead-weight, a constantly reciprocating pin, a single pivoted hook having a curved shank on said plunger, an arm on said hook on the opposite side thereof to said reciprocating pin, a stop engaging said arm to swing said hook into range of said pin when the plunger has descended to a predetermined low position, the pin acting against said curved shank of the hook to disengage these parts, the arm by reason of its own weight acting to maintain the parts in the disengaged position when the plunger has been lifted to the top of the stroke of the reciprocating pin.

In witness whereof, I have hereunto signed my name this 31st day of January 1916, in the presence of two subscribing witnesses.

I RICHARD THOMAS GROCOTT. Witnesses:

HARRY WELLING POITON, REGINALD G. PICKUP.

@gpies of this patent may be obtained for five cents each, by addressing the Gommissioner of Estate,

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